The effectiveness of low-level laser therapy and low-intensity pulsed ultrasound in reducing pain induced by orthodontic separation: a randomized controlled trial

Table 3 The multiple comparisons between the LLLT, the LIPUS, and the control groups at different time points

Evaluation time	Multiple comparisons ^a
Evaluation time	LLLT-C	LIPUS-C	LLLT-LIPUS
5 min 1 h 6 h 12 h 24 h 48 h 72 h 96 h	(P = .002) (P < .001) (P < .001) (P < .001) (P < .001) (P < .001) (P < .001) (P < .001)	(P = .003) (P < .001) (P < .001) (P < .001) (P < .001) (P < .001) (P < .001) (P < .001)	(P = .89) NS (P = .49) NS (P = .12) NS (P = .21) NS (P = .33) NS (P = .94) NS (P = .96) NS (P = .45) NS

^amann-whitney U test; C indicates control group; LLLT, low-level laser group; LIPUS, low-intensity pulsed ultrasound group; NS, non-significant

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